linux-kernel - Re: [PATCH net v5 3/5] net: macb: move ring size computation to functions

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Message-ID: <ba25cca0-adbf-435b-8c21-f03c567045b1@amd.com>
Date: Thu, 11 Sep 2025 12:13:10 +0530
From: "Karumanchi, Vineeth" <vineeth@....com>
To: Théo Lebrun <theo.lebrun@...tlin.com>,
 Andrew Lunn <andrew+netdev@...n.ch>, "David S. Miller"
 <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>,
 Nicolas Ferre <nicolas.ferre@...rochip.com>,
 Claudiu Beznea <claudiu.beznea@...on.dev>,
 Geert Uytterhoeven <geert@...ux-m68k.org>,
 Harini Katakam <harini.katakam@...inx.com>,
 Richard Cochran <richardcochran@...il.com>,
 Russell King <linux@...linux.org.uk>
Cc: netdev@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, Thomas Petazzoni
 <thomas.petazzoni@...tlin.com>, Tawfik Bayouk <tawfik.bayouk@...ileye.com>
Subject: Re: [PATCH net v5 3/5] net: macb: move ring size computation to
 functions

Hi Theo,

On 9/10/2025 9:45 PM, Théo Lebrun wrote:
<...>
>   #define DEFAULT_TX_RING_SIZE	512 /* must be power of 2 */
>   #define MIN_TX_RING_SIZE	64
>   #define MAX_TX_RING_SIZE	4096
> -#define TX_RING_BYTES(bp) (macb_dma_desc_get_size(bp) \
> - * (bp)->tx_ring_size)
>   
>   /* level of occupied TX descriptors under which we wake up TX process */
>   #define MACB_TX_WAKEUP_THRESH(bp)	(3 * (bp)->tx_ring_size / 4)
> @@ -2470,11 +2466,20 @@ static void macb_free_rx_buffers(struct macb *bp)
>   	}
>   }
>   
> +static unsigned int macb_tx_ring_size_per_queue(struct macb *bp)
> +{
> + return macb_dma_desc_get_size(bp) * bp->tx_ring_size + bp- 
>  >tx_bd_rd_prefetch;
> +}
> +
> +static unsigned int macb_rx_ring_size_per_queue(struct macb *bp)
> +{
> + return macb_dma_desc_get_size(bp) * bp->rx_ring_size + bp- 
>  >rx_bd_rd_prefetch;
> +}
> +

it would be good to have these functions as inline.
May be as a separate patch.

<...>
-- 
🙏 Vineeth